Differential D8762 Diff 28333 intern/rigidbody/rb_convex_hull_api.cpp

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intern/rigidbody/rb_convex_hull_api.cpp

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				/*
				* This program is free software; you can redistribute it and/or
				* modify it under the terms of the GNU General Public License
				* as published by the Free Software Foundation; either version 2
				* of the License, or (at your option) any later version.
				*
				* This program is distributed in the hope that it will be useful,
				* but WITHOUT ANY WARRANTY; without even the implied warranty of
				* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
				* GNU General Public License for more details.
				*
				* You should have received a copy of the GNU General Public License
				* along with this program; if not, write to the Free Software Foundation,
				* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
				*
				* The Original Code is Copyright (C) 2020 Blender Foundation,
				* All rights reserved.
				*/

				#include "LinearMath/btConvexHullComputer.h"
				#include "RBI_hull_api.h"

				plConvexHull plConvexHullCompute(float (*coords)[3], int count)
				{
				btConvexHullComputer *computer = new btConvexHullComputer;
				computer->compute(reinterpret_cast<float >(coords), sizeof(coords), count, 0, 0);
				return reinterpret_cast<plConvexHull>(computer);
				}

				void plConvexHullDelete(plConvexHull hull)
				{
				btConvexHullComputer computer(reinterpret_cast<btConvexHullComputer >(hull));
				delete computer;
				}

				int plConvexHullNumVertices(plConvexHull hull)
				{
				btConvexHullComputer computer(reinterpret_cast<btConvexHullComputer >(hull));
				return computer->vertices.size();
				}

				int plConvexHullNumFaces(plConvexHull hull)
				{
				btConvexHullComputer computer(reinterpret_cast<btConvexHullComputer >(hull));
				return computer->faces.size();
				}

				void plConvexHullGetVertex(plConvexHull hull, int n, float coords[3], int *original_index)
				{
				btConvexHullComputer computer(reinterpret_cast<btConvexHullComputer >(hull));
				const btVector3 &v(computer->vertices[n]);
				coords[0] = v[0];
				coords[1] = v[1];
				coords[2] = v[2];
				(*original_index) = computer->original_vertex_index[n];
				}

				int plConvexHullGetFaceSize(plConvexHull hull, int n)
				{
				btConvexHullComputer computer(reinterpret_cast<btConvexHullComputer >(hull));
				const btConvexHullComputer::Edge e_orig, e;
				int count;

				for (e_orig = &computer->edges[computer->faces[n]], e = e_orig, count = 0;
				count == 0 \|\| e != e_orig;
				e = e->getNextEdgeOfFace(), count++) {
				;
				}
				return count;
				}

				void plConvexHullGetFaceVertices(plConvexHull hull, int n, int *vertices)
				{
				btConvexHullComputer computer(reinterpret_cast<btConvexHullComputer >(hull));
				const btConvexHullComputer::Edge e_orig, e;
				int count;

				for (e_orig = &computer->edges[computer->faces[n]], e = e_orig, count = 0;
				count == 0 \|\| e != e_orig;
				e = e->getNextEdgeOfFace(), count++) {
				vertices[count] = e->getTargetVertex();
				}
				}